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I can try. What are they?

there is two questions that say evaluate. I have to upload the image though

oh lawd, I seen this in my textbook this year but I haven't learnt it yet, sorry :/

oh okay well thanks for looking at it :/

what is the question ? like what we have to do with that ?

I have no clue on how to do the question. It just say evaluate then the image i posted.

|dw:1439566610288:dw|

so replace n by 2 to find 2nd term
3 to find 3rd term
untill 7

|dw:1439566934306:dw|

would it be -4?

yes right !

so i just keep plugging number in till i get to 7? Or could i just skip to 7?

wait a sec let me solve it first
been a year haven't done question like this :/

you have to find all terms then add them.

we have to evaluate
if it say find sum then we can use the formula.

Nnesha its not function like power series right ?

wait doesn't matter you will get the same answer
no need to find all terms

its just total numbers i think

\[\huge\rm S_n = \frac{ a_1(1-r^n )}{ 1-r }\] use this formula plug in the r and n values then sovle

a_1= first term
r= ratio
n= number of total terms!

so i could do it either way and get the same answer?

yes right

okay thank you!!

my pleasure!